Improve cray config messages

No change in logic. Just make error messages more uniform and complete

auxdir/x_ac_cray.m4

@@ -139,7 +139,7 @@ AC_DEFUN([X_AC_CRAY],
 	    ]]
 	  )],
 	  [have_cray_files="yes"],
-	  [AC_MSG_ERROR(There is a problem linking to the Cray api.)])
+	  [AC_MSG_ERROR(There is a problem linking to the Cray API)])
 
         # See if we have 5.2UP01 alpscomm functions
         AC_SEARCH_LIBS([alpsc_pre_suspend],
@@ -159,7 +159,7 @@ AC_DEFUN([X_AC_CRAY],
             ]]
           )],
           [have_cray_files="yes"],
-          [AC_MSG_ERROR(There is a problem linking to the Cray API.)])
+          [AC_MSG_ERROR(There is a problem linking to the Cray API)])
       fi
 
       LIBS="$saved_LIBS"
@@ -169,7 +169,7 @@ AC_DEFUN([X_AC_CRAY],
     done
 
     if test -z "$have_cray_files"; then
-      AC_MSG_ERROR([Unable to locate Cray API dir install. (usually in /opt/cray)])
+      AC_MSG_ERROR([Unable to locate Cray APIs (usually in /opt/cray/alpscomm and /opt/cray/job)])
     else
       if test "$ac_have_native_cray" = "yes"; then
         AC_MSG_NOTICE([Running on a Cray system in native mode without ALPS])

configure

@@ -22181,7 +22181,7 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :
   have_cray_files="yes"
 else
-  as_fn_error $? "There is a problem linking to the Cray api." "$LINENO" 5
+  as_fn_error $? "There is a problem linking to the Cray API" "$LINENO" 5
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
@@ -22267,7 +22267,7 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :
   have_cray_files="yes"
 else
-  as_fn_error $? "There is a problem linking to the Cray API." "$LINENO" 5
+  as_fn_error $? "There is a problem linking to the Cray API" "$LINENO" 5
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
@@ -22280,7 +22280,7 @@ rm -f core conftest.err conftest.$ac_objext \
     done
     if test -z "$have_cray_files"; then
-      as_fn_error $? "Unable to locate Cray API dir install. (usually in /opt/cray)" "$LINENO" 5
+      as_fn_error $? "Unable to locate Cray APIs (usually in /opt/cray/alpscomm and /opt/cray/job)" "$LINENO" 5
     else
       if test "$ac_have_native_cray" = "yes"; then
         { $as_echo "$as_me:${as_lineno-$LINENO}: Running on a Cray system in native mode without ALPS" >&5