Applied patch by PulkoMandy, adjusted and extended by myself:

* integrating most of the locale kit into the build (and image)
* removed LocaleBuild.h and _IMPEXP_LOCALE since that does not make
  sense for elf (which usually exports all symbols anyway)
* added a couple of locale kit related pseudo targets for convenience
Hey, some of that stuff already seems to work :-)

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30545 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/langinfo.h

@@ -1,8 +1,6 @@
 #ifndef _LANGINFO_H_
 #define	_LANGINFO_H_
 
-#include <LocaleBuild.h>
-
 #include <LocaleStrings.h>
 #include <nl_types.h>
 
@@ -81,6 +79,6 @@
 #ifdef __cplusplus
 extern "C"
 #endif
-_IMPEXP_LOCALE char	*nl_langinfo(nl_item);
+char *nl_langinfo(nl_item);
 
 #endif	/* _LANGINFO_H_ */

headers/posix/monetary.h

@@ -3,14 +3,12 @@
 
 #include <stdarg.h>
 
-#include <LocaleBuild.h>
-
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-_IMPEXP_LOCALE ssize_t strfmon(char *string, size_t maxSize, const char *format, ...);
-_IMPEXP_LOCALE ssize_t vstrfmon(char *string, size_t maxSize, const char *format, va_list args);
+ssize_t strfmon(char *string, size_t maxSize, const char *format, ...);
+ssize_t vstrfmon(char *string, size_t maxSize, const char *format, va_list args);
 
 #ifdef __cplusplus
 }