bbappend for php extension recipe

recipes-devtools/php/php_5.6.16.bbappend

+
+EXTRA_OECONF += "--enable-elphel"
+
+DEV_DIR ?= "${TOPDIR}/../../rootfs-elphel/elphel-apps-php-extension/ext"
+
+do_unpack_append(){
+    print("Link extension to the main tree")
+    if os.path.isdir("${DEV_DIR}"):
+        print("DEV_DIR exists - creating links...")
+        devdir_abspath = os.path.abspath("${DEV_DIR}")
+        for path, folders, files in os.walk("${DEV_DIR}"):
+            folders[:]=[fd for fd in folders if fd != ".git"]
+            for folder in folders:
+                folder_abspath = os.path.abspath(os.path.join(path, folder))
+                folder_relpath = folder_abspath.replace(devdir_abspath+"/", '')
+                os.system("cd ${S}/ext;mkdir -p "+folder_relpath)
+            for filename in files:
+                file_abspath = os.path.abspath(os.path.join(path, filename))
+                file_relpath = file_abspath.replace(devdir_abspath+"/", '')
+                os.system("cd ${S}/ext;ln -sf "+file_abspath+" "+file_relpath)
+}
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