Rework the build system to be more modular

Split most of the work off into make/base.mk and allow for easy wrappers
to be created around that that can build with different instrumentation
in their own build directory.

Create wrappers for the following:
 - release build
 - debug build
 - afl++ fuzzing build
 - static analysis with clang
 - clang memory sanitizer
 - clang address/undefined sanitizer

make/analyze.mk

@@ -0,0 +1,9 @@
+BUILD_DIR=build/analyze/
+-include make/base.mk
+
+analyze:
+	mkdir -p reports/static-analysis
+	scan-build -o reports/static-analysis/ -plist-html --status-bugs make -rRf make/analyze.mk all
+
+distclean: clean
+	rm -rf reports/static-analysis