Set AIX executables to have exempt SED status

Customers complained IBM SDK8 has this status, but Semeru Runtimes
don't, such that they cannot run Semeru Runtimes on their systems
when migrating from IBM SDK8. This is a temporary fix without any
other impacts, while we are investigating a complete solution
for a larger issue (HugePages are not used for codeCache even though
proper -Xlp option is specified).

Signed-off-by: Julian <zlwang@ca.ibm.com>

make/autoconf/flags-ldflags.m4

@@ -27,7 +27,7 @@
 #
 
 # ===========================================================================
-# (c) Copyright IBM Corp. 2019, 2019 All Rights Reserved
+# (c) Copyright IBM Corp. 2019, 2024 All Rights Reserved
 # ===========================================================================
 
 AC_DEFUN([FLAGS_SETUP_LDFLAGS],
@@ -87,7 +87,7 @@ AC_DEFUN([FLAGS_SETUP_LDFLAGS_HELPER],
         -fPIC"
 
   elif test "x$TOOLCHAIN_TYPE" = xxlc; then
-    BASIC_LDFLAGS="-b64 -brtl -bnolibpath -bexpall -bernotok -btextpsize:64K \
+    BASIC_LDFLAGS="-b64 -brtl -bnolibpath -bexpall -bernotok -brwexec_must -btextpsize:64K \
         -bdatapsize:64K -bstackpsize:64K"
     # libjvm.so has gotten too large for normal TOC size; compile with qpic=large and link with bigtoc
     BASIC_LDFLAGS_JVM_ONLY="-Wl,-lC_r -bbigtoc"