Disable strongop-overflow warning for GCC compiler

Summary: There is a false warning that causes compilation issues when GCC is compiler and target is 32-bit.  Turn off the warning to avoid -Werror errors.

Reviewed By: RomanFedotovFB

Differential Revision: D55090465

fbshipit-source-id: c00ca2b9ac7c1579e371e93d7d08cdfbe4b91515

Author: graphicsMan

dispenso/CMakeLists.txt

@@ -22,8 +22,9 @@ endif()
 
 target_compile_options(dispenso PRIVATE
   $<$<CXX_COMPILER_ID:MSVC>:/W3 /WX>
+  $<$<CXX_COMPILER_ID:GNU>: -Wno-stringop-overflow>
   $<$<NOT:$<CXX_COMPILER_ID:MSVC>>:-Wall -Wextra -pedantic -Wconversion -Wno-sign-conversion -Werror>
-  )
+)
 
 if(WIN32)
   target_compile_definitions(dispenso PUBLIC NOMINMAX)