Update to upstream version '2.0.10+dfsg1'
with Debian dir a1eb90942c7e620ba733373c589995cce6b5194a

Update to upstream version '2.0.9+dfsg1'
with Debian dir c68692c3e2e160acbf711619aecafd1043985d94

Otherwise the date is not valid.

Add fix-cross-building-907711.patch to fix cross-building by using
the right pkg-config depending on the architecture (Closes: #907711)

Thanks Helmut Grohne for the report and the patch.

Include /usr/share/dpkg/architecture.mk and .../pkg-info.mk to provide
DEB_HOST_ARCH_CPU, DEB_HOST_MULTIARCH and SOURCE_DATE_EPOCH, instead of getting
them through shell invocations.

NMU: Revert problematic multiarch change to fix unusable -dev package (#909778)

See merge request !1

This reverts commit 10a830fc.

This checks that dynamic linking with either pkg-config or
sdl2-config works correctly. I'd normally also test static linking,
but that doesn't actually work, because libSDL2 depends on
libasound, which hasn't provided a static library in Debian since
2013.