Build: Switch to CMake :^)

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

Libraries/LibGfx/CMakeLists.txt

@@ -0,0 +1,26 @@
+set(SOURCES
+    AffineTransform.cpp
+    Bitmap.cpp
+    CharacterBitmap.cpp
+    Color.cpp
+    DisjointRectSet.cpp
+    Emoji.cpp
+    FloatRect.cpp
+    Font.cpp
+    GIFLoader.cpp
+    ImageDecoder.cpp
+    Painter.cpp
+    Palette.cpp
+    Path.cpp
+    PNGLoader.cpp
+    Point.cpp
+    Rect.cpp
+    ShareableBitmap.cpp
+    Size.cpp
+    StylePainter.cpp
+    SystemTheme.cpp
+    Triangle.cpp
+)
+
+serenity_lib(LibGfx gfx)
+target_link_libraries(LibGfx LibM LibCore)

Libraries/LibGfx/Makefile

@@ -1,31 +0,0 @@
-OBJS = \
-    AffineTransform.o \
-    Bitmap.o \
-    CharacterBitmap.o \
-    Color.o \
-    DisjointRectSet.o \
-    Emoji.o \
-    Font.o \
-    FloatRect.o \
-    GIFLoader.o \
-    ImageDecoder.o \
-    PNGLoader.o \
-    Painter.o \
-    Palette.o \
-    Path.o \
-    Point.o \
-    Rect.o \
-    ShareableBitmap.o \
-    Size.o \
-    StylePainter.o \
-    SystemTheme.o \
-    Triangle.o
-
-LIBRARY = libgfx.a
-
-install:
-	mkdir -p $(SERENITY_BASE_DIR)/Root/usr/include/LibGfx/
-	cp *.h $(SERENITY_BASE_DIR)/Root/usr/include/LibGfx/
-	cp $(LIBRARY) $(SERENITY_BASE_DIR)/Root/usr/lib/
-
-include ../../Makefile.common