translation(hy): renamed am.po -> hy.po for armenian lang translations

According to ISO-639, the correct 2 letter language code is HY not AM,
so let's rename am.po.

Also, add hy.po to the CHECKFILES Make target and convert the file to
Unix lineformat.

closes: #17380

Signed-off-by: Gagik Hakobyan <hakgagik@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

.github/MAINTAINERS

@@ -681,7 +681,6 @@ runtime/tutor/tutor.ru.cp1251		@RestorerZ
 runtime/tutor/tutor.ru.utf-8		@RestorerZ
 src/iscygpty.*				@k-takata
 src/libvterm/				@leonerd
-src/po/am.po				@gagikh
 src/po/ca.po				@nfdisco
 src/po/de.po				@chrisbra
 src/po/eo.po				@dpelle
@@ -689,6 +688,7 @@ src/po/es.po				@victorhck
 src/po/fi.po				@flammie
 src/po/fr.po				@dpelle
 src/po/ga.po				@kscanne
+src/po/hy.po				@gagikh
 src/po/it.po				@azc100
 src/po/ja.po				@k-takata
 src/po/ru.po				@RestorerZ

src/po/Make_all.mak

@@ -4,7 +4,6 @@
 
 LANGUAGES = \
 		af \
-		am \
 		ca \
 		cs \
 		cs.cp1250 \
@@ -17,6 +16,7 @@ LANGUAGES = \
 		fr \
 		ga \
 		hu \
+		hy \
 		it \
 		ja \
 		ja.euc-jp \
@@ -50,7 +50,6 @@ LANGUAGES = \
 
 POFILES = \
 		af.po \
-		am.po \
 		ca.po \
 		cs.po \
 		cs.cp1250.po \
@@ -63,6 +62,7 @@ POFILES = \
 		fr.po \
 		ga.po \
 		hu.po \
+		hy.po \
 		it.po \
 		ja.po \
 		ja.euc-jp.po \
@@ -96,7 +96,6 @@ POFILES = \
 
 MOFILES = \
 		af.mo \
-		am.mo \
 		ca.mo \
 		cs.mo \
 		da.mo \
@@ -108,6 +107,7 @@ MOFILES = \
 		fr.mo \
 		ga.mo \
 		hu.mo \
+		hy.mo \
 		it.mo \
 		ja.mo \
 		ko.UTF-8.mo \
@@ -157,6 +157,7 @@ CHECKFILES = \
 		fr.ck \
 		ga.ck \
 		hu.ck \
+		hy.ck \
 		it.ck \
 		ja.ck \
 		ja.euc-jp.ck \