Create common github call define and start using it * Makefile.in: add GITHUB_PKG_UPDATE * src/blas_switch.mk, src/double-conversion.mk, src/libffi.mk, src/libgeotiff.mk, src/libmodbus.mk, src/libproxy.mk, src/librsvg.mk, src/libsndfile.mk, src/libsodium.mk, src/libvpx.mk, src/netcdf.mk, src/of-statistics.mk, src/openblas.mk, src/opencv.mk, src/openjpeg.mk, src/openlibm.mk, src/paho-mqtt-c.mk, src/pcre2.mk, src/portaudio.mk, src/rapidjson.mk, src/rtmidi.mk, src/suitesparse.mk, src/sundials-ida.mk, src/wt.mk, src/wxwidgets.mk, src/yasm.mk, src/zeromq.mk : call GITHUB_PKG_UPDATE in update

"perl" cannot run scripts in paths with non-ASCII characters on Windows.
To work around that, change to the directory containing the script first,
then call it without path.
FIXME: Could changing the directory have negative side effects for the
"makeinfo" script?

diff --git "a/util/makeinfo.bat" "b/util/makeinfo.bat"
index 5ae4286..6a51502 100644
--- "a/util/makeinfo.bat"	
+++ "b/util/makeinfo.bat"	
@@ -1,2 +1,4 @@
 @echo off
-perl "%~dpn0" %*
+%~d0
+cd "%~dp0"
+perl "%~n0" %*