Fixed OpenMP compiler flags (#654)

Author: aayushg55

CMakeLists.txt

@@ -177,6 +177,7 @@ if (MATX_EN_NVPL OR MATX_EN_X86_FFTW)
     message(STATUS "Enabling OpenMP support")
     find_package(OpenMP REQUIRED)
     target_link_libraries(matx INTERFACE OpenMP::OpenMP_CXX)
+    target_compile_options(matx INTERFACE ${OpenMP_CXX_FLAGS})
     target_compile_definitions(matx INTERFACE MATX_EN_OMP=1)
     if (MATX_EN_NVPL)
         message(STATUS "Enabling NVPL library support for ARM CPUs")