build: fix wrong syntax in vcpkg cmake #48

Job	Run time
build (-DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++, -DCMAKE_BUILD_TYPE=Release)	3m 34s
build (-DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++, -DCMAKE_BUILD_TYPE=Release, -DENABLE_LINK...	3m 16s
build (-DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++, -DCMAKE_BUILD_TYPE=Release, -DENABLE_SDL=ON)	3m 37s
build (-DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++, -DCMAKE_BUILD_TYPE=Debug)	2m 5s
build (-DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++, -DCMAKE_BUILD_TYPE=Debug, -DENABLE_LINK=OFF)	1m 58s
build (-DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++, -DCMAKE_BUILD_TYPE=Debug, -DENABLE_SDL=ON)	2m 20s
build (-DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++, -DCMAKE_BUILD_TYPE=Release)	2m 47s
build (-DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++, -DCMAKE_BUILD_TYPE=Release, -DENABL...	3m 12s
build (-DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++, -DCMAKE_BUILD_TYPE=Release, -DENABL...	4m 55s
build (-DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++, -DCMAKE_BUILD_TYPE=Debug)	1m 46s
build (-DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++, -DCMAKE_BUILD_TYPE=Debug, -DENABLE_...	1m 47s
build (-DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++, -DCMAKE_BUILD_TYPE=Debug, -DENABLE_...	2m 19s
	33m 36s

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