fix some common typos

These were identified using: http://github.com/lyda/misspell-check
and run like this to create a bourne shell script using GNU sed's
-i option:

git ls-files|grep -vF .bin | misspellings -f - |grep -v '^ERROR:' |perl \
-pe 's/^(.*?)\[(\d+)\]: (\w+) -> "(.*?)"$/sed -i '\''${2}s!$3!$4!'\'' $1/'

Manually eliding the FP, "rela->real" and resolving "addres" to
address (not "adders") we get this:

  sed -i '450s!thru!through!' Changelog
  sed -i '260s!neccessary!necessary!' coroutine-sigaltstack.c
  sed -i '54s!miniscule!minuscule!' disas.c
  sed -i '1094s!thru!through!' hw/usb/hcd-ehci.c
  sed -i '1095s!thru!through!' hw/usb/hcd-ehci.c
  sed -i '21s!unecessary!unnecessary!' qapi-schema-guest.json
  sed -i '307s!explictly!explicitly!' qemu-ga.c
  sed -i '490s!preceeding!preceding!' qga/commands-posix.c
  sed -i '792s!addres!address!' qga/commands-posix.c
  sed -i '6s!beeing!being!' tests/tcg/test-mmap.c

Also, manually fix "arithmentic", spotted by Peter Maydell:

  sed -i 's!arithmentic!arithmetic!' coroutine-sigaltstack.c

Signed-off-by: Jim Meyering <meyering@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

qga/commands-posix.c

@@ -487,7 +487,7 @@ int64_t qmp_guest_fsfreeze_thaw(Error **err)
          * was returned the filesystem was *not* unfrozen by that particular
          * call.
          *
-         * since multiple preceeding FIFREEZEs require multiple calls to FITHAW
+         * since multiple preceding FIFREEZEs require multiple calls to FITHAW
          * to unfreeze, continuing issuing FITHAW until an error is returned,
          * in which case either the filesystem is in an unfreezable state, or,
          * more likely, it was thawed previously (and remains so afterward).
@@ -789,7 +789,7 @@ GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
             strncpy(ifr.ifr_name,  info->value->name, IF_NAMESIZE);
             if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) {
                 snprintf(err_msg, sizeof(err_msg),
-                         "failed to get MAC addres of %s: %s",
+                         "failed to get MAC address of %s: %s",
                          ifa->ifa_name,
                          strerror(errno));
                 error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);