Build: Switch to CMake :^)

Closes https://github.com/SerenityOS/serenity/issues/2080

Libraries/LibHTTP/CMakeLists.txt

@@ -0,0 +1,10 @@
+set(SOURCES
+    HttpJob.cpp
+    HttpRequest.cpp
+    HttpResponse.cpp
+    HttpsJob.cpp
+    Job.cpp
+)
+
+serenity_lib(LibHTTP http)
+target_link_libraries(LibHTTP LibCore LibTLS)

Libraries/LibHTTP/Makefile

@@ -1,19 +0,0 @@
-OBJS = HttpResponse.o \
-	   HttpRequest.o \
-	   HttpJob.o \
-	   HttpsJob.o \
-	   Job.o
-
-LIBRARY = libhttp.a
-
-LIB_DEPS = Core
-
-POST_LIBRARY_BUILD = $(QUIET) $(MAKE) install
-
-install:
-	mkdir -p $(SERENITY_BASE_DIR)/Root/usr/include/sys/
-	mkdir -p $(SERENITY_BASE_DIR)/Root/usr/lib/
-	cp *.h $(SERENITY_BASE_DIR)/Root/usr/include/
-	cp $(LIBRARY) $(SERENITY_BASE_DIR)/Root/usr/lib/
-
-include ../../Makefile.common