test libs: rename gitweb-lib.sh to lib-gitweb.sh

Rename gitweb-lib.sh to lib-gitweb.sh for consistency with other test
library files.

When it was introduced in 05526071cb (gitweb: split test suite into
library and tests, 2009-08-27) this naming pattern was more
common.

Since then all but one other such library which didn't start with
"lib-*.sh" such as t6000lib.sh has been been renamed, see
e.g. 9d488eb40e (Move t6000lib.sh to lib-*, 2010-05-07).

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t9500-gitweb-standalone-no-errors.sh

@@ -13,7 +13,7 @@ or warnings to log.'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
-. ./gitweb-lib.sh
+. ./lib-gitweb.sh
 
 # ----------------------------------------------------------------------
 # no commits (empty, just initialized repository)

t/t9501-gitweb-standalone-http-status.sh

@@ -13,7 +13,7 @@ code and message.'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
-. ./gitweb-lib.sh
+. ./lib-gitweb.sh
 
 #
 # Gitweb only provides the functionality tested by the 'modification times'

t/t9502-gitweb-standalone-parse-output.sh

@@ -13,7 +13,7 @@ in the HTTP header or the actual script output.'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
-. ./gitweb-lib.sh
+. ./lib-gitweb.sh
 
 # ----------------------------------------------------------------------
 # snapshot file name and prefix