Fixed include installation path

guacamole/libguac/Makefile.am

@@ -2,10 +2,12 @@ AUTOMAKE_OPTIONS = gnu
 
 AM_CFLAGS = -Werror -Wall -Iinclude
 
+libguacincdir = $(includedir)/guacamole
+libguacinc_HEADERS = include/client.h include/guacio.h include/protocol.h include/uuidtree.h
+
 lib_LTLIBRARIES = libguac.la
 
 libguac_la_SOURCES = src/client.c src/clientreg.c src/guacio.c src/protocol.c src/uuidtree.c
-include_HEADERS = include/client.h include/guacio.h include/protocol.h include/uuidtree.h
 
 libguac_la_LDFLAGS = -version-info 0:0:0