(API Change) libobs: Add profile_name_store_t parameter to obs_startup

Due to all the threads in libobs it wouldn't be safe to make that
parameter reconfigurable after libobs is initialized without adding
even more synchronization. On the other hand, adding a function to set
the name store before calling obs_startup would solve the problem of
passing a name store into libobs, but it can lead to more complicated
semantics for obs_get_profiler_name_store (e.g., should it always return
the current name store even if libobs isn't initialized until someone
calls set_name_store(NULL)? should obs_shutdown call
set_name_store(NULL)? Passing it as obs_startup parameter avoids
these (and hopefully other) potential misunderstandings

libobs/obs.h

@@ -19,6 +19,7 @@
 
 #include "util/c99defs.h"
 #include "util/bmem.h"
+#include "util/profiler.h"
 #include "util/text-lookup.h"
 #include "graphics/graphics.h"
 #include "graphics/vec2.h"
@@ -241,8 +242,9 @@ struct obs_source_frame {
  * Initializes OBS
  *
  * @param  locale  The locale to use for modules
+ * @param  store   The profiler name store for OBS to use or NULL
  */
-EXPORT bool obs_startup(const char *locale);
+EXPORT bool obs_startup(const char *locale, profiler_name_store_t *store);
 
 /** Releases all data associated with OBS and terminates the OBS context */
 EXPORT void obs_shutdown(void);
@@ -264,6 +266,13 @@ EXPORT void obs_set_locale(const char *locale);
 /** @return the current locale */
 EXPORT const char *obs_get_locale(void);
 
+/**
+ * Returns the profiler name store (see util/profiler.h) used by OBS, which is
+ * either a name store passed to obs_startup, an internal name store, or NULL
+ * in case obs_initialized() returns false.
+ */
+EXPORT profiler_name_store_t *obs_get_profiler_name_store(void);
+
 /**
  * Sets base video ouput base resolution/fps/format.
  *