elput: Use proper variable type

The 'getenv' function returns char * ... not a const char *, so adjust
variable type to match

Signed-off-by: Chris Michael <cp.michael@samsung.com>

src/lib/elput/elput_evdev.c

@@ -61,7 +61,7 @@ static int
 _keyboard_fd_get(off_t size)
 {
    int fd = 0;
-   const char *path;
+   char *path;
    char tmp[PATH_MAX];
    long flags;