qcacld-3.0: Make absolute path to relative

Make include paths relative to kernel build directory. This will fix
the following error due to long absolute path in include directories,

	make[2]: execvp: /bin/sh: Argument list too long
	make[2]: *** [path/to/object/file] Error 127

Change-Id: Ic930384f38f2166e6bede8d16ac37b359dd48a0d
CRs-Fixed: 2661829

Kbuild

@@ -25,9 +25,9 @@ CONFIG_QCA_CLD_WLAN_PROFILE ?= $(WLAN_PROFILE)
 
 ifeq ($(KERNEL_BUILD), n)
 ifneq ($(ANDROID_BUILD_TOP),)
-      override WLAN_ROOT := $(ANDROID_BUILD_TOP)/$(WLAN_ROOT)
-      override WLAN_COMMON_INC := $(ANDROID_BUILD_TOP)/$(WLAN_COMMON_INC)
-      override WLAN_FW_API := $(ANDROID_BUILD_TOP)/$(WLAN_FW_API)
+      override WLAN_ROOT := $(shell realpath --relative-to $(CURDIR) $(ANDROID_BUILD_TOP)/$(WLAN_ROOT))
+      override WLAN_COMMON_INC := $(shell realpath --relative-to $(CURDIR) $(ANDROID_BUILD_TOP)/$(WLAN_COMMON_INC))
+      override WLAN_FW_API := $(shell realpath --relative-to $(CURDIR) $(ANDROID_BUILD_TOP)/$(WLAN_FW_API))
 endif
 endif