Use uppercase variables in kaem-era

lowercase variables are inconsistent, bring them into line with rest of
live-bootstrap

sysa/run-after-fiwix.kaem

@@ -21,18 +21,16 @@ BINDIR="${ARCH_DIR}/bin"
 BUILDDIR="${ARCH_DIR}/artifact"
 
 sysa=/sysa
-distfiles=/sysa/distfiles
-prefix=/usr
-bindir=${prefix}/bin
-libdir=${prefix}/lib
-incdir=${prefix}/include
-srcdir=${prefix}/src
+DISTFILES=/sysa/distfiles
+PREFIX=/usr
+BINDIR=${PREFIX}/bin
+LIBDIR=${PREFIX}/lib/mes
+INCDIR=${PREFIX}/include
+SRCDIR=${PREFIX}/src
 TMPDIR=/tmp # tmpdir is needed for patch to work
 
 PATH=/usr/bin
 
-libdir=${libdir}/mes
-
 # make
 pkg="make-3.82"
 cd ${pkg}