tool/ports: run unzip with UNZIP_OPT

The patch supports both, a download-specific UNZIP_OPT(download) and a
general UNZIP_OPT that can be defined across downloads.
UNZIP_OPT(download) overrides UNZIP_OPT.

Note, the `--strip-components=1` argument is not required for unzip.

Issue #1357

tool/ports/mk/install.mk

@@ -211,7 +211,8 @@ _file_name = $(call _prefer,$(NAME($1)),$(notdir $(URL($1))))
 _archive_name = $(call _prefer,$(NAME($1)),$(notdir $(URL($1))))
 _archive_dir  = $(call _assert,$(DIR($1)),Missing definition of DIR($*) in $(PORT))
 
-_tar_opt = $(call _prefer,$(TAR_OPT($1)),--strip-components=1)
+_tar_opt   = $(call _prefer,$(TAR_OPT($1)),--strip-components=1)
+_unzip_opt = $(call _prefer,$(UNZIP_OPT($1)),$(UNZIP_OPT))
 
 #
 # Archive extraction functions for various archive types
@@ -220,7 +221,7 @@ _extract_function(tgz)     = tar xfz $(ARCHIVE) -C $(DIR) $(call _tar_opt,$1)
 _extract_function(tar.gz)  = tar xfz $(ARCHIVE) -C $(DIR) $(call _tar_opt,$1)
 _extract_function(tar.xz)  = tar xfJ $(ARCHIVE) -C $(DIR) $(call _tar_opt,$1)
 _extract_function(tar.bz2) = tar xfj $(ARCHIVE) -C $(DIR) $(call _tar_opt,$1)
-_extract_function(zip)     = unzip -o -q -d $(DIR) $(ARCHIVE)
+_extract_function(zip)     = unzip -o -q -d $(DIR) $(call _unzip_opt,$1) $(ARCHIVE)
 
 _ARCHIVE_EXTS := tar.gz tar.xz tgz tar.bz2 zip
 
@@ -244,4 +245,3 @@ _extract_function = $(call _assert,\
 	$(VERBOSE)\
 		mkdir -p $(DIR);\
 		$(call _extract_function,$*)
-