Build: consider IPCCOMPILER and FORMCOMPILER just for ordering

Build them if they don't exist, but don't care about them being
newer or older than the target.

I believe this is what was causing build loops where IPCCompiler was
being run a second time, rebuilding its .h file, then a library
would depend on that .h file and get re-archived, then an
application would need relinking, and something in that whole
process would trigger IPCCompiler running again touching its .h
file.

Applications/FontEditor/Makefile

@@ -10,7 +10,7 @@ LIB_DEPS = GUI Draw Core IPC
 
 FontEditor.cpp: UI_FontEditorBottom.h
 
-UI_FontEditorBottom.h: FontEditorBottom.frm FORMCOMPILER
+UI_FontEditorBottom.h: FontEditorBottom.frm | FORMCOMPILER
  $(QUIET) $(FORMCOMPILER) $< > $@
 
 EXTRA_CLEAN = UI_FontEditorBottom.h

Servers/AudioServer/Makefile

@@ -12,10 +12,10 @@ EXTRA_CLEAN = AudioServerEndpoint.h AudioClientEndpoint.h
 
 *.cpp: AudioServerEndpoint.h AudioClientEndpoint.h
 
-AudioServerEndpoint.h: AudioServer.ipc IPCCOMPILER
+AudioServerEndpoint.h: AudioServer.ipc | IPCCOMPILER
  @echo "IPC $<"; $(IPCCOMPILER) $< > $@
 
-AudioClientEndpoint.h: AudioClient.ipc IPCCOMPILER
+AudioClientEndpoint.h: AudioClient.ipc | IPCCOMPILER
  @echo "IPC $<"; $(IPCCOMPILER) $< > $@
 
 install:

Servers/ProtocolServer/Makefile

@@ -12,10 +12,10 @@ LIB_DEPS = Core IPC
 
 *.cpp: ProtocolServerEndpoint.h ProtocolClientEndpoint.h
 
-ProtocolServerEndpoint.h: ProtocolServer.ipc IPCCOMPILER
+ProtocolServerEndpoint.h: ProtocolServer.ipc | IPCCOMPILER
  @echo "IPC $<"; $(IPCCOMPILER) $< > $@
 
-ProtocolClientEndpoint.h: ProtocolClient.ipc IPCCOMPILER
+ProtocolClientEndpoint.h: ProtocolClient.ipc | IPCCOMPILER
  @echo "IPC $<"; $(IPCCOMPILER) $< > $@
 
 include ../../Makefile.common

Servers/WindowServer/Makefile

@@ -22,10 +22,10 @@ LIB_DEPS = Draw Core Thread Pthread IPC
 
 *.cpp: WindowServerEndpoint.h WindowClientEndpoint.h
 
-WindowServerEndpoint.h: WindowServer.ipc IPCCOMPILER
+WindowServerEndpoint.h: WindowServer.ipc | IPCCOMPILER
  @echo "IPC $<"; $(IPCCOMPILER) $< > $@
 
-WindowClientEndpoint.h: WindowClient.ipc IPCCOMPILER
+WindowClientEndpoint.h: WindowClient.ipc | IPCCOMPILER
  @echo "IPC $<"; $(IPCCOMPILER) $< > $@
 
 EXTRA_CLEAN = WindowServerEndpoint.h WindowClientEndpoint.h