Move API levels from `uint32_t` to `int`.

(cherrypick of a6c71a09670ca636cca5cfea9d74b03a951e2b5e.)

Bug: N/A
Test: builds
Change-Id: I9c414e30e3c4fe2a4e16a2fe4ce18eae85fe4844
diff --git a/linker/linker.h b/linker/linker.h
index dd45f67..91d3ddf 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -131,8 +131,8 @@
 // void ___cfi_slowpath_diag(uint64_t CallSiteTypeId, void *Ptr, void *DiagData, void *Ret);
 void ___cfi_fail(uint64_t CallSiteTypeId, void* Ptr, void *DiagData, void *Ret);
 
-void set_application_target_sdk_version(uint32_t target);
-uint32_t get_application_target_sdk_version();
+void set_application_target_sdk_version(int target);
+int get_application_target_sdk_version();
 
 enum {
   /* A regular namespace is the namespace with a custom search path that does