PR #1853: Add support for QCC compiler

Imported from GitHub PR #1853

Since QCC (QNX C Compiler) is directly derived from the GNU C Compiler, same flags can be used.
Merge cfac630 into 0898cd3

Merging this change closes #1853

COPYBARA_INTEGRATE_REVIEW=#1853 from pablorcum:master cfac630
PiperOrigin-RevId: 736152861
Change-Id: I249b74faeeb51aac6508173b4be25e2fd7766986

Author: pablorcum

absl/copts/AbseilConfigureCopts.cmake

@@ -71,7 +71,7 @@ else()
 endif()
 
 
-if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "QCC")
   set(ABSL_DEFAULT_COPTS "${ABSL_GCC_FLAGS}")
   set(ABSL_TEST_COPTS "${ABSL_GCC_TEST_FLAGS}")
 elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")  # MATCHES so we get both Clang and AppleClang