Add include for check symbol exists in cmakelists

Commit migrated from https://github.com/dotnet/corefx/commit/0c1d1d43170f259600749ce93850962374692e97

diff --git a/src/libraries/Native/Windows/clrcompression/CMakeLists.txt b/src/libraries/Native/Windows/clrcompression/CMakeLists.txt
index 98c292b..b22aeeb 100644 (file)
--- a/src/libraries/Native/Windows/clrcompression/CMakeLists.txt
+++ b/src/libraries/Native/Windows/clrcompression/CMakeLists.txt
@@ -77,6 +77,7 @@ else()
     )
 endif()
 
+include (CheckSymbolExists)
 check_symbol_exists(vsnprintf stdio.h HAVE_VSNPRINTF)
 if (HAVE_VSNPRINTF) # HAVE_VSNPRINTF is CMAKE variable, compiler doesn't know about it yet
     add_definitions(-DHAVE_VSNPRINTF) # this is for the compiler