in the case of an empty FRAMEWORKALTINSTALLLAST, this patch prevents leaving
an astray linebreak and two tabs in the resulting Makefile.
Before change:
```
.PHONY: commoninstall
commoninstall: check-clean-src \
altbininstall libinstall inclinstall libainstall \
sharedinstall altmaninstall \
```
After change (with empty FRAMEWORKALTINSTALLLAST):
```
.PHONY: commoninstall
commoninstall: check-clean-src \
altbininstall libinstall inclinstall libainstall \
sharedinstall altmaninstall
```
.PHONY: commoninstall
commoninstall: check-clean-src @FRAMEWORKALTINSTALLFIRST@ \
altbininstall libinstall inclinstall libainstall \
- sharedinstall altmaninstall \
- @FRAMEWORKALTINSTALLLAST@
+ sharedinstall altmaninstall @FRAMEWORKALTINSTALLLAST@
# Install shared libraries enabled by Setup
DESTDIRS= $(exec_prefix) $(LIBDIR) $(BINLIBDEST) $(DESTSHARED)