Rename linker greylist to exempt-list

Update language to comply with Android's inclusive language guidance

See https://source.android.com/setup/contribute/respectful-code for reference

  #inclusivefixit

Bug: http://b/162536543
Test: device boots
Change-Id: Ia80fb2f3be6abdadbd061570d48a4ef0fefcfebc
diff --git a/libnativeloader/include/nativeloader/dlext_namespaces.h b/libnativeloader/include/nativeloader/dlext_namespaces.h
index ed335ee..79537ef 100644
--- a/libnativeloader/include/nativeloader/dlext_namespaces.h
+++ b/libnativeloader/include/nativeloader/dlext_namespaces.h
@@ -45,10 +45,10 @@
    */
   ANDROID_NAMESPACE_TYPE_SHARED = 2,
 
-  /* This flag instructs linker to enable grey-list workaround for the namespace.
+  /* This flag instructs linker to enable exempt-list workaround for the namespace.
    * See http://b/26394120 for details.
    */
-  ANDROID_NAMESPACE_TYPE_GREYLIST_ENABLED = 0x08000000,
+  ANDROID_NAMESPACE_TYPE_EXEMPT_LIST_ENABLED = 0x08000000,
 
   /* This flag instructs linker to use this namespace as the anonymous
    * namespace. The anonymous namespace is used in the case when linker cannot