[build] Fix options to find zlib in BOLT build system

Author: giordano

deps/BOLT.mk

@@ -30,7 +30,7 @@ LLVM_LDFLAGS += $(LDFLAGS)
 LLVM_LDFLAGS += $(LLVM_LDFLAGS)
 LLVM_CMAKE += -DLLVM_TARGETS_TO_BUILD:STRING=host -DCMAKE_BUILD_TYPE=Release
 LLVM_CMAKE += -DLLVM_ENABLE_LIBXML2=OFF -DLLVM_HOST_TRIPLE="$(or $(XC_HOST),$(BUILD_MACHINE))"
-LLVM_CMAKE += -DLLVM_ENABLE_ZLIB=ON -DZLIB_LIBRARY="$(build_prefix)/lib"
+LLVM_CMAKE += -DLLVM_ENABLE_ZLIB=FORCE_ON -DZLIB_ROOT="$(build_prefix)"
 
 LLVM_CMAKE += -DLLVM_BINDINGS_LIST="" -DLLVM_ENABLE_BINDINGS=OFF -DLLVM_INCLUDE_DOCS=Off -DLLVM_ENABLE_TERMINFO=Off -DHAVE_LIBEDIT=Off