shared: declare DECLARE_(DL,PTR)SYM as static

Declare the symbol pointers as static, otherwise the compiler will add
them to the data section instead of bss.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://github.com/kmod-project/kmod/pull/358
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>

shared/util.h

diff --git a/shared/util.h b/shared/util.h
index 7363f42..5a4256a 100644
--- a/shared/util.h
+++ b/shared/util.h
@@ -187,10 +187,10 @@
 #define DLSYM_ARG(symbol__) &sym_##symbol__, STRINGIFY(symbol__),
 
 /* For symbols being dynamically loaded */
-#define DECLARE_DLSYM(symbol) typeof(symbol) *sym_##symbol = NULL
+#define DECLARE_DLSYM(symbol) static typeof(symbol) *sym_##symbol = NULL
 
 /* Pointer indirection to support linking directly */
-#define DECLARE_PTRSYM(symbol) typeof(symbol) *sym_##symbol = symbol
+#define DECLARE_PTRSYM(symbol) static typeof(symbol) *sym_##symbol = symbol
 
 /*
  * Helper defines, to be done locally before including this header to switch between