build: make libcrucible a static library

libcrucible at one time in the distant past had to be a shared library
to force global C++ object initialization; however, this is no longer
required.

Make libcrucible static to solve various rpath and soname versioning
issues, especially when distros try (unwisely) to package the library
separately.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>

test/Makefile

@@ -16,7 +16,7 @@ FORCE:
 include ../makeflags
 
 LIBS = -lcrucible -lpthread
-BEES_LDFLAGS = -L../lib -Wl,-rpath=$(abspath ../lib) $(LDFLAGS)
+BEES_LDFLAGS = -L../lib $(LDFLAGS)
 
 .depends:
 	mkdir -p $@