Fix cmake warning (#116000)

Fixes #115998

Author: radekdoulik

eng/native/configureplatform.cmake

@@ -437,7 +437,7 @@ endif(CLR_CMAKE_TARGET_OS STREQUAL haiku)
 if(CLR_CMAKE_TARGET_OS STREQUAL emscripten OR CLR_CMAKE_TARGET_OS STREQUAL browser)
     set(CLR_CMAKE_TARGET_UNIX 1)
     set(CLR_CMAKE_TARGET_BROWSER 1)
-endif(CLR_CMAKE_TARGET_OS STREQUAL emscripten)
+endif(CLR_CMAKE_TARGET_OS STREQUAL emscripten OR CLR_CMAKE_TARGET_OS STREQUAL browser)
 
 if(CLR_CMAKE_TARGET_OS STREQUAL wasi)
     set(CLR_CMAKE_TARGET_WASI 1)