dtprintinfo: make it build

Also, it was easier just to use a single Makefile.am rather than one for
every subdir, so thats what we did here.

cde/programs/dtprintinfo/UI/Makefile.am

@@ -1,16 +0,0 @@
-MAINTAINERCLEANFILES = Makefile.in
-
-noinst_LIBRARIES = libDtPrintinfo.a
-
-libDtPrintinfo_a_CXXFLAGS = -I.. -I../libUI -I../libUI/MotifUI -I../objects \
-			    -I../util -I../objects -I../objects/PrintObj
-
-if AIX
-libDtPrintinfo_a_CXXFLAGS += -DHAS_EXCEPTIONS
-endif
-
-libDtPrintinfo_a_SOURCES = DtActions.C     DtApp.C         DtDetailsLabel.C \
-			   DtFindD.C       DtFindSet.C     DtMainW.C \
-			   DtPrinterIcon.C DtProps.C       DtPrtJobIcon.C \
-			   DtPrtProps.C    DtSetModList.C  DtSetPref.C \
-			   DtWorkArea.C