CHROMIUM: Add #line to i/zephyr/logging/log_msg.h

Work around coreboot GCC preprocessor bug.

BUG=b:272518464
TEST=./twister -c -C --toolchain host

Change-Id: I4ad9f4f6da9c4d04fdbaabee40902497dbfdc19d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/5570620
Commit-Queue: Aaron Massey <aaronmassey@google.com>
Commit-Queue: Jeremy Bettis <jbettis@chromium.org>
Auto-Submit: Jeremy Bettis <jbettis@chromium.org>
Reviewed-by: Aaron Massey <aaronmassey@google.com>
Tested-by: Jeremy Bettis <jbettis@chromium.org>

include/zephyr/logging/log_msg.h

@@ -4,6 +4,12 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+/*
+ * TODO(b/272518464): Work around coreboot GCC preprocessor bug.
+ * #line marks the *next* line, so it is off by one.
+ */
+#line 12
+
 #ifndef ZEPHYR_INCLUDE_LOGGING_LOG_MSG_H_
 #define ZEPHYR_INCLUDE_LOGGING_LOG_MSG_H_
 
@@ -24,6 +30,12 @@
 #include <alloca.h>
 #endif
 
+/*
+ * TODO(b/272518464): Work around coreboot GCC preprocessor bug.
+ * #line marks the *next* line, so it is off by one.
+ */
+#line 38
+
 #ifdef __cplusplus
 extern "C" {
 #endif