squashfs4: make inline functions static to fix build errors

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 38562

tools/squashfs4/patches/190-no_nonstatic_inline.patch

+--- a/squashfs-tools/mksquashfs.c
++++ b/squashfs-tools/mksquashfs.c
+@@ -735,13 +735,13 @@ void cache_block_put(struct file_buffer 
+ 			+ (((char *)A) - data_cache)))
+ 
+ 
+-inline void inc_progress_bar()
++static inline void inc_progress_bar()
+ {
+ 	cur_uncompressed ++;
+ }
+ 
+ 
+-inline void update_progress_bar()
++static inline void update_progress_bar()
+ {
+ 	pthread_mutex_lock(&progress_mutex);
+ 	pthread_cond_signal(&progress_wait);
+@@ -749,7 +749,7 @@ inline void update_progress_bar()
+ }
+ 
+ 
+-inline void waitforthread(int i)
++static inline void waitforthread(int i)
+ {
+ 	TRACE("Waiting for thread %d\n", i);
+ 	while(thread[i] != 0)
+@@ -3358,7 +3358,7 @@ struct inode_info *lookup_inode(struct s
+ }
+ 
+ 
+-inline void add_dir_entry(char *name, char *pathname, struct dir_info *sub_dir,
++static inline void add_dir_entry(char *name, char *pathname, struct dir_info *sub_dir,
+ 	struct inode_info *inode_info, struct dir_info *dir)
+ {
+ 	if((dir->count % DIR_ENTRIES) == 0) {