Fixed make depend on linux

Makefile.ship

@@ -1255,7 +1255,7 @@ LANG= C
 LDCONFIG= ldconfig
 LN= ln
 MAKE= make
-MAKEDEPEND= makedepend
+MAKEDEPEND= /usr/bin/makedepend
 MKDIR= mkdir
 MV= mv
 PWDCMD= pwd
@@ -4202,6 +4202,11 @@ depend: hsrc custom/Makefile
 	else \
 	    ${TRUE}; \
 	fi
+	${Q} if [ ! -x "${MAKEDEPEND}" ]; then \
+		echo "makedepend command not found: ${MAKEDEPEND}"; \
+		echo "aborting depend rule"; \
+		exit 1; \
+	fi
 	${V} echo '=-=-=-=-= Invoking depend rule for cscript =-=-=-=-='
 	${Q} cd cscript; ${MAKE} -f Makefile ${CSCRIPT_PASSDOWN} depend
 	${V} echo '=-=-=-=-= Back to the main Makefile for $@ rule =-=-=-=-='