Fix path quoting in json generator

GenerateLayerJson.cmake was wrapping paths with quotes and
add_custom_target COMMAND was escaping spaces in those paths
unconditionally, generating invalid paths:

/has spaces/ -> "/has spaces/" -> "/has\ spaces/"

Remove the extra quotes so the escaped spaces are correctly
interpreted by the shell:

/has spaces/ -> /has\ spaces/

Change-Id: I68e95104c3b470813c843eb68cdc31a4eec6691e

cmake/GenerateLayerJson.cmake

@@ -9,12 +9,12 @@ function(GENERATE_LAYER_JSON_FILE TARGET RELATIVE_PATH_PREFIX LAYER_BINARY IN_FI
     math(EXPR GFXRECONSTRUCT_LAYER_JSON_VERSION "${GFXRECONSTRUCT_PROJECT_VERSION_MAJOR} << 22 | ${GFXRECONSTRUCT_PROJECT_VERSION_MINOR} << 12 | ${GFXRECONSTRUCT_PROJECT_VERSION_PATCH}")
 
     set(CONFIG_DEFINES
-        -DINPUT_FILE="${IN_FILE}"
-        -DVK_VERSION="${VULKAN_VERSION_MAJOR}.${VULKAN_VERSION_MINOR}.${VULKAN_VERSION_PATCH}"
-        -DGFXRECONSTRUCT_VERSION="${GFXRECONSTRUCT_LAYER_JSON_VERSION}"
-        -DGFXRECONSTRUCT_VERSION_STRING="${GFXRECONSTRUCT_PROJECT_VERSION_MAJOR}.${GFXRECONSTRUCT_PROJECT_VERSION_MINOR}.${GFXRECONSTRUCT_PROJECT_VERSION_PATCH}${GFXRECON_PROJECT_VERSION_DESIGNATION}"
-        -DOUTPUT_FILE="${OUT_FILE}"
-        -DRELATIVE_LAYER_BINARY="${RELATIVE_PATH_PREFIX}${LAYER_BINARY}"
+        -DINPUT_FILE=${IN_FILE}
+        -DVK_VERSION=${VULKAN_VERSION_MAJOR}.${VULKAN_VERSION_MINOR}.${VULKAN_VERSION_PATCH}
+        -DGFXRECONSTRUCT_VERSION=${GFXRECONSTRUCT_LAYER_JSON_VERSION}
+        -DGFXRECONSTRUCT_VERSION_STRING=${GFXRECONSTRUCT_PROJECT_VERSION_MAJOR}.${GFXRECONSTRUCT_PROJECT_VERSION_MINOR}.${GFXRECONSTRUCT_PROJECT_VERSION_PATCH}${GFXRECON_PROJECT_VERSION_DESIGNATION}
+        -DOUTPUT_FILE=${OUT_FILE}
+        -DRELATIVE_LAYER_BINARY=${RELATIVE_PATH_PREFIX}${LAYER_BINARY}
     )
     add_custom_target(${TARGET} ALL COMMAND ${CMAKE_COMMAND} ${CONFIG_DEFINES} -P "${CMAKE_CURRENT_BINARY_DIR}/generator.cmake")
 endfunction()