ctags: Minor changes to fix ctags output

At present ctags emits lines with unmatched quotes which means that the
output file is invalid. This is with exuberant-ctags version 5.9~svn201103
but I also see it with plain ctags. I am not sure that it is a bug though.

Make a few minor changes in the source code to fix this problem.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/linux/compiler-gcc.h

@@ -12,7 +12,8 @@
 /* Optimization barrier */
 
 /* The "volatile" is due to gcc bugs */
-#define barrier() __asm__ __volatile__("": : :"memory")
+#define barrier() \
+	__asm__ __volatile__("": : :"memory")
 /*
  * This version is i.e. to prevent dead stores elimination on @ptr
  * where gcc and llvm may behave differently when otherwise using
@@ -26,7 +27,8 @@
  * the compiler that the inline asm absolutely may see the contents
  * of @ptr. See also: https://llvm.org/bugs/show_bug.cgi?id=15495
  */
-#define barrier_data(ptr) __asm__ __volatile__("": :"r"(ptr) :"memory")
+#define barrier_data(ptr) \
+	__asm__ __volatile__("": :"r"(ptr) :"memory")
 
 /*
  * This macro obfuscates arithmetic on a variable address so that gcc