Deps builder: Add support for building GMP

Required for the new boolean code, disabled by default
until all platforms have landed the libs and the boolean
code actually lands in master.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D8384

source/creator/CMakeLists.txt

@@ -694,6 +694,23 @@ elseif(WIN32)
     )
   endif()
 
+  if(WITH_GMP)
+    install(
+          FILES ${LIBDIR}/gmp/lib/libgmp-10.dll
+          DESTINATION "."
+    )
+    install(
+          FILES ${LIBDIR}/gmp/lib/libgmpxx.dll
+          DESTINATION "."
+          CONFIGURATIONS Release;RelWithDebInfo;MinSizeRel
+    )
+    install(
+          FILES ${LIBDIR}/gmp/lib/libgmpxx_d.dll
+          DESTINATION "."
+          CONFIGURATIONS Debug
+    )
+  endif()
+
   if(WITH_WINDOWS_PDB)
     if(WITH_WINDOWS_STRIPPED_PDB)
       # Icky hack for older cmake from https://stackoverflow.com/a/21198501