Fix up handing of fields with leading names that should be all caps.
Add a compile test to confirm things are working as expected.
diff --git a/Makefile.am b/Makefile.am
index 3e21db8..064efdf 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -413,6 +413,7 @@
objectivec/GPBCodedInputStream_PackagePrivate.h \
objectivec/GPBCodedOutputStream.h \
objectivec/GPBCodedOutputStream.m \
+ objectivec/GPBCodedOutputStream_PackagePrivate.h \
objectivec/GPBDescriptor.h \
objectivec/GPBDescriptor.m \
objectivec/GPBDescriptor_PackagePrivate.h \