Applying docdir fix (needed by distro packaging)

So that I don't have to carry it over from the 2.4.1 packaging.

doc/assets/css/Makefile.am

@@ -2,7 +2,7 @@
 
 AUTOMAKE_OPTIONS = foreign
 
-docdir = $(datadir)/doc/icecast/assets/css
-doc_DATA = style.css
+otherdocdir = $(docdir)/assets/css
+otherdoc_DATA = style.css
 
-EXTRA_DIST = $(doc_DATA)
+EXTRA_DIST = $(otherdoc_DATA)

doc/assets/font/Makefile.am

@@ -2,12 +2,12 @@
 
 AUTOMAKE_OPTIONS = foreign
 
-docdir = $(datadir)/doc/icecast/assets/font
-doc_DATA = FiraMono-Bold.eot FiraMono-Regular.eot \
+otherdocdir = $(docdir)/assets/font
+otherdoc_DATA = FiraMono-Bold.eot FiraMono-Regular.eot \
 	   FiraSans-Bold.eot FiraSans-BoldItalic.woff \
 	   FiraSans-Italic.eot FiraSans-Regular.eot \
 	   FiraMono-Bold.woff FiraMono-Regular.woff \
 	   FiraSans-BoldItalic.eot FiraSans-Bold.woff \
     	   FiraSans-Italic.woff FiraSans-Regular.woff
 
-EXTRA_DIST = $(doc_DATA)
+EXTRA_DIST = $(otherdoc_DATA)

doc/assets/img/Makefile.am

@@ -2,7 +2,7 @@
 
 AUTOMAKE_OPTIONS = foreign
 
-docdir = $(datadir)/doc/icecast/assets/img
-doc_DATA = xiph-community.svg
+otherdocdir = $(docdir)/assets/img
+otherdoc_DATA = xiph-community.svg
 
-EXTRA_DIST = $(doc_DATA)
+EXTRA_DIST = $(otherdoc_DATA)

doc/img/Makefile.am

@@ -2,7 +2,7 @@
 
 AUTOMAKE_OPTIONS = foreign
 
-docdir = $(datadir)/doc/icecast/img
-doc_DATA = listener_auth1.png listener_auth2.png listener_auth3.png masterslave.png relay.png
+otherdocdir = $(docdir)/img
+otherdoc_DATA = listener_auth1.png listener_auth2.png listener_auth3.png masterslave.png relay.png
 
-EXTRA_DIST = $(doc_DATA)
+EXTRA_DIST = $(otherdoc_DATA)