fix typo

cmake/StaticBuild.cmake

@@ -139,9 +139,9 @@ endfunction()
 set(openssl_system_env "")
 if(CMAKE_CROSSCOMPILING)
   if(ARCH_TRIPLET STREQUAL x86_64-w64-mingw32)
-    set(openssl_system_env SYSTEM=MINGW64 RC=${CMAKE_RC_COMPILER} AR="${ARCH_TRIPLET}-ar r" RANLIB=${ARCH_TRIPLET}-ranlib)
+    set(openssl_system_env SYSTEM=MINGW64 RC=${CMAKE_RC_COMPILER} AR=${ARCH_TRIPLET}-ar RANLIB=${ARCH_TRIPLET}-ranlib)
   elseif(ARCH_TRIPLET STREQUAL i686-w64-mingw32)
-    set(openssl_system_env SYSTEM=MINGW32 RC=${CMAKE_RC_COMPILER} AR="${ARCH_TRIPLET}-ar r" RANLIB=${ARCH_TRIPLET}-ranlib)
+    set(openssl_system_env SYSTEM=MINGW32 RC=${CMAKE_RC_COMPILER} AR=${ARCH_TRIPLET}-ar RANLIB=${ARCH_TRIPLET}-ranlib)
   endif()
 endif()
 build_external(openssl