Add symbols for version information

This allows us to automatically pull the version of FS out of a core
file for better reporting of bugs.

src/switch_version.c

@@ -36,12 +36,20 @@
 #include <switch.h>
 #include <switch_version.h>
 
-SWITCH_DECLARE(const char *)switch_version_major(void) {return SWITCH_VERSION_MAJOR;}
-SWITCH_DECLARE(const char *)switch_version_minor(void) {return SWITCH_VERSION_MINOR;}
-SWITCH_DECLARE(const char *)switch_version_micro(void) {return SWITCH_VERSION_MICRO;}
+const char *switch_version_major_str = SWITCH_VERSION_MAJOR;
+const char *switch_version_minor_str = SWITCH_VERSION_MINOR;
+const char *switch_version_micro_str = SWITCH_VERSION_MICRO;
+const char *switch_version_revision_str = SWITCH_VERSION_REVISION;
+const char *switch_version_revision_human_str = SWITCH_VERSION_REVISION_HUMAN;
+const char *switch_version_full_str = SWITCH_VERSION_FULL;
+const char *switch_version_full_human_str = SWITCH_VERSION_FULL_HUMAN;
 
-SWITCH_DECLARE(const char *)switch_version_revision(void) {return SWITCH_VERSION_REVISION;}
-SWITCH_DECLARE(const char *)switch_version_revision_human(void) {return SWITCH_VERSION_REVISION_HUMAN;}
-SWITCH_DECLARE(const char *)switch_version_full(void) {return SWITCH_VERSION_FULL;}
-SWITCH_DECLARE(const char *)switch_version_full_human(void) {return SWITCH_VERSION_FULL_HUMAN;}
+SWITCH_DECLARE(const char *)switch_version_major(void) {return switch_version_major_str;}
+SWITCH_DECLARE(const char *)switch_version_minor(void) {return switch_version_minor_str;}
+SWITCH_DECLARE(const char *)switch_version_micro(void) {return switch_version_micro_str;}
+
+SWITCH_DECLARE(const char *)switch_version_revision(void) {return switch_version_revision_str;}
+SWITCH_DECLARE(const char *)switch_version_revision_human(void) {return switch_version_revision_human_str;}
+SWITCH_DECLARE(const char *)switch_version_full(void) {return switch_version_full_str;}
+SWITCH_DECLARE(const char *)switch_version_full_human(void) {return switch_version_full_human_str;}