Build: Explicitly specify Homebrew Bison path on macOS for libs

To avoid using the too old system version.

build_files/build_environment/cmake/osl.cmake

@@ -7,8 +7,18 @@ if(WIN32)
   set(OSL_FLEX_BISON -DFLEX_EXECUTABLE=${LIBDIR}/flexbison/win_flex.exe -DBISON_EXECUTABLE=${LIBDIR}/flexbison/win_bison.exe)
 else()
   set(OSL_CMAKE_CXX_STANDARD_LIBRARIES)
-  set(OSL_FLEX_BISON)
   set(OSL_OPENIMAGEIO_LIBRARY "${LIBDIR}/openimageio/lib/OpenImageIO${SHAREDLIBEXT};${LIBDIR}/png/lib/${LIBPREFIX}png16${LIBEXT};${LIBDIR}/jpeg/lib/${LIBPREFIX}jpeg${LIBEXT};${LIBDIR}/tiff/lib/${LIBPREFIX}tiff${LIBEXT};${LIBDIR}/openexr/lib/IlmImf${OPENEXR_VERSION_POSTFIX}${SHAREDLIBEXT}")
+
+  if(APPLE)
+    # Explicitly specify Homebrew path, so we don't use the old system one.
+    if(BLENDER_PLATFORM_ARM)
+      set(OSL_FLEX_BISON -DBISON_EXECUTABLE=/opt/homebrew/opt/bison/bin/bison)
+    else()
+      set(OSL_FLEX_BISON -DBISON_EXECUTABLE=/usr/local/opt/bison/bin/bison)
+    endif()
+  else()
+    set(OSL_FLEX_BISON)
+  endif()
 endif()
 
 set(OSL_EXTRA_ARGS