change log with changes from v3.0.15 (KhronosGroup#1126)

* initial change log with changes from v3.0.15

* update cl_khr_kernel_clock link in a few other places

* final change log updates

api/appendix_e.asciidoc

@@ -601,5 +601,24 @@ Changes from *v3.0.14*:
 
 Changes from *v3.0.15*:
 
-  * Added new extensions:
+  * Moved all KHR extension text out of the OpenCL Extension specification and into the main specifications.
+    The OpenCL Extension specification will be removed in a subsequent revision.
+  * Clarified several error conditions that could return {CL_INVALID_PLATFORM}, see {khronos-opencl-pr}/1063[#1063].
+  * Strengthened requirements for the {CL_DEVICE_TYPE} query, see  {khronos-opencl-pr}/1069[#1069].
+  * Clarified {clSetEventCallback} behavior for command errors, see {khronos-opencl-pr}/1071[#1071].
+  * Moved footnote text for {CL_KERNEL_ARG_TYPE_QUALIFIER} into the main spec, see {khronos-opencl-pr}/1097[#1097].
+  * {cl_khr_command_buffer_mutable_dispatch_EXT} (provisional):
+      ** Added {CL_MUTABLE_DISPATCH_ASSERTS_KHR}, see {khronos-opencl-pr}/992[#992].
+  * {cl_khr_semaphore_EXT}:
+      ** Removed a redundant error condition, see {khronos-opencl-pr}/1052[#1052]
+  * The following extensions have been finalized and are no longer provisional:
+      ** {cl_khr_semaphore_EXT}
+      ** {cl_khr_external_semaphore_EXT}
+      ** {cl_khr_external_semaphore_opaque_fd_EXT}
+      ** {cl_khr_external_semaphore_sync_fd_EXT}
+      ** {cl_khr_external_memory_EXT}
+      ** {cl_khr_external_memory_dma_buf_EXT}
+      ** {cl_khr_external_memory_opaque_fd_EXT}
+      ** {cl_khr_external_memory_win32_EXT}
+  * Added new extension:
       ** {cl_khr_kernel_clock_EXT} (provisional)

c/appendix_a.asciidoc

@@ -43,3 +43,12 @@ Changes from *v3.0.14*:
   * Clarified that the *nextafter* built-in function works with all floating-point types, see {khronos-opencl-pr}/953[#953].
   * Clarified that the async copy and wait group events built-in functions must be called within converged control flow, see {khronos-opencl-pr}/1015[#1015].
   * Removed unnecessary rounding mode text from the descriptions of the geometric and common functions, see {khronos-opencl-pr}/1027[#1027].
+
+Changes from *v3.0.15*:
+
+  * Moved all KHR extension text out of the OpenCL Extension specification and into the main specifications.
+    The OpenCL Extension specification will be removed in a subsequent revision.
+  * Fixed the derived formula for `atanh`, see {khronos-opencl-pr}/1048[#1048].
+  * Removed an incorrect statement about geometric functions operating component-wise, see {khronos-opencl-pr}/1137[#1137].
+  * Added new extension:
+      ** {cl_khr_kernel_clock_EXT} (provisional)

env/appendix_a.asciidoc

@@ -43,3 +43,10 @@ Changes from *v3.0.8*:
 Changes from *v3.0.14*:
 
   * Fixed several numerical compliance bugs, see {khronos-opencl-pr}/937[#937].
+
+Changes from *v3.0.15*:
+
+  * Clarified that 16-bit and 64-bit floats can be passed as kernel arguments to SPIR-V kernels, see {khronos-opencl-pr}/1049[#1049].
+  * Adds the numerical value of the image channel order and image channel data type to several tables, see {khronos-opencl-pr}/1050[#1050].
+  * Added new extension:
+      ** {cl_khr_kernel_clock_EXT} (provisional)