Fix External CI

Author: winskuo-quic

.gitignore

@@ -18,6 +18,7 @@ cmake-out*
 cmake-out-android/
 build-android/
 build-x86/
+build-hexagon/
 dist/
 arm-scratch/
 executorch.egg-info

CMakeLists.txt

@@ -52,8 +52,8 @@ set(EXECUTORCH_ROOT ${CMAKE_CURRENT_SOURCE_DIR})
 
 # Hexagon toolchain with release build complains about code in third party
 # libraries.
-if(${CMAKE_SYSTEM_PROCESSOR} MATCHES Hexagon AND ${CMAKE_BUILD_TYPE} STREQUAL
-                                                 "Release"
+if("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "Hexagon" AND "${CMAKE_BUILD_TYPE}"
+                                                     STREQUAL "Release"
 )
   add_compile_options(
     -Wno-error=format -Wno-error=implicit-int-conversion