Disable the tests meant to run when compiling natively

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>

Index: webkitgtk-2.14.5/Source/cmake/OptionsCommon.cmake
===================================================================
--- webkitgtk-2.14.5.orig/Source/cmake/OptionsCommon.cmake
+++ webkitgtk-2.14.5/Source/cmake/OptionsCommon.cmake
@@ -67,8 +67,11 @@ endif ()
 # Detect Cortex-A53 core if CPU is ARM64 and OS is Linux.
 # Query /proc/cpuinfo for each available core and check reported CPU part number: 0xd03 signals Cortex-A53.
 # (see Main ID Register in ARM Cortex-A53 MPCore Processor Technical Reference Manual)
-set(WTF_CPU_ARM64_CORTEXA53_INITIALVALUE OFF)
-if (WTF_CPU_ARM64 AND (${CMAKE_SYSTEM_NAME} STREQUAL "Linux"))
+if( NOT WTF_CPU_ARM64_CORTEXA53_INITIALVALUE)
+    set(WTF_CPU_ARM64_CORTEXA53_INITIALVALUE OFF)
+endif(WTF_CPU_ARM64_CORTEXA53_INITIALVALUE)
+
+if (WTF_CPU_ARM64 AND NOT CMAKE_CROSSCOMPILING AND (${CMAKE_SYSTEM_NAME} STREQUAL "Linux"))
     execute_process(COMMAND nproc OUTPUT_VARIABLE PROC_COUNT)
     math(EXPR PROC_MAX ${PROC_COUNT}-1)
     foreach (PROC_ID RANGE ${PROC_MAX})