Backport a link order fix from upstream

Upstream made a fix for the linker ordering after marking v0.1. Since I
have the benefit of doing this *years after the fact*, I'll just
backport that thing instead of inventing my own fix.

debian/patches/0001-Fix-linking-in-OBS.patch

@@ -0,0 +1,21 @@
+From: KottV <kv@kott.no-ip.biz>
+Date: Wed, 16 Mar 2022 09:11:07 +1000
+Subject: Fix linking in OBS
+
+Fixes #5.
+
+(cherry picked from commit c7881dfae9635b99c16ae4b37db19c847cfed115)
+---
+ src/Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/Makefile b/src/Makefile
+index b0173d8..d42124e 100644
+--- a/src/Makefile
++++ b/src/Makefile
+@@ -51,4 +51,4 @@ $(DEPFILES):
+ include $(wildcard $(DEPFILES))
+ 
+ $(TARGET): $(OBJS)
+-	cc ${LDFLAGS} -lm -o $(TARGET) $(OBJS)
++	cc -o $(TARGET) $(OBJS) ${LDFLAGS} -lm