* z80-amstradcpc: fixed target naming mess, so -Tamstradcpc works now, also fixed the help text

compiler/msg/errore.msg

@@ -4275,7 +4275,7 @@ x*2Tfreertos_FreeRTOS
 x*2Tlinux_Linux
 # z80 targets
 Z*2Tembedded_Embedded
-Z*2Tamstradcpcp_Amstrad CPC
+Z*2Tamstradcpc_Amstrad CPC
 Z*2Tmsxdos_MSX-DOS
 Z*2Tzxspectrum_ZX Spectrum
 # wasm32 targets

compiler/systems/i_amstradcpc.pas

@@ -31,8 +31,8 @@ unit i_amstradcpc;
        system_z80_amstradcpc_info : tsysteminfo =
           (
             system       : system_z80_amstradcpc;
-            name         : 'AMSTRADCPC';
-            shortname    : 'CPC';
+            name         : 'Amstrad CPC';
+            shortname    : 'amstradcpc';
             flags        : [
                             tf_under_development,
 {$ifdef Z80_SMARTLINK_SECTIONS}