Fix mingw builds on windows missing bz2.dll

Meson produces bz2.dll with msvc but libbz2.dll with mingw, and ignores the library name in the .def file. And of course both compilers just go ahead and generate an import library that pulls in a DLL different from what's in the .def file without questions.

Author: LBPHacker

.github/build.sh

@@ -923,6 +923,9 @@ function compile_bzip2() {
 	get_and_cd bzip2-1.0.8.tar.gz bzip2_version
 	dos2unix libbz2.def
 	patch_breakpoint $patches_real/bzip2-meson.patch apply
+	if [[ $BSH_HOST_PLATFORM-$BSH_HOST_LIBC == windows-msvc ]]; then
+		patch_breakpoint $patches_real/bzip2-msvc-libname.patch apply
+	fi
 	local meson_configure=meson$'\t'setup
 	if [[ $BSH_DEBUG_RELEASE == release ]]; then
 		meson_configure+=$'\t'-Dbuildtype=debugoptimized

patches/bzip2-meson.patch

@@ -1,13 +1,3 @@
-diff -Naur bzip2-1.0.8.old/libbz2.def bzip2-1.0.8.new/libbz2.def
---- bzip2-1.0.8.old/libbz2.def	2022-10-19 08:26:45.345787900 +0200
-+++ bzip2-1.0.8.new/libbz2.def	2022-10-19 08:26:45.392406700 +0200
-@@ -1,5 +1,4 @@
--LIBRARY			LIBBZ2
--DESCRIPTION		"libbzip2: library for data compression"
-+LIBRARY			BZ2
- EXPORTS
- 	BZ2_bzCompressInit
- 	BZ2_bzCompress
 diff -Naur bzip2-1.0.8.old/meson.build bzip2-1.0.8.new/meson.build
 --- bzip2-1.0.8.old/meson.build	1970-01-01 01:00:00.000000000 +0100
 +++ bzip2-1.0.8.new/meson.build	2022-10-19 08:26:45.392406700 +0200

patches/bzip2-msvc-libname.patch

@@ -0,0 +1,10 @@
+diff -Naur bzip2-1.0.8.old/libbz2.def bzip2-1.0.8.new/libbz2.def
+--- bzip2-1.0.8.old/libbz2.def	2022-10-19 08:26:45.345787900 +0200
++++ bzip2-1.0.8.new/libbz2.def	2022-10-19 08:26:45.392406700 +0200
+@@ -1,5 +1,4 @@
+-LIBRARY			LIBBZ2
+-DESCRIPTION		"libbzip2: library for data compression"
++LIBRARY			BZ2
+ EXPORTS
+ 	BZ2_bzCompressInit
+ 	BZ2_bzCompress