Correct minor spelling and grammar errors

This work was performed as a GCI 2018 task.

aclocal/canonical-target-name.m4

@@ -1,5 +1,5 @@
 dnl canonicalize target cpu
-dnl NOTE: Most rtems targets do not fullfil autoconf's
+dnl NOTE: Most rtems targets do not fulfil autoconf's
 dnl target naming conventions "processor-vendor-os"
 dnl Therefore autoconf's AC_CANONICAL_TARGET will fail for them
 dnl and we have to fix it for rtems ourselves 

aclocal/rtems-build-top.m4

@@ -5,7 +5,7 @@ AC_DEFUN([RTEMS_BUILD_TOP],
 [dnl
 #
 # This is a copy of the horrible hack in rtems-top.m4 and it is simpler to
-# copy it that attempt to clean this crap up.
+# copy it than attempt to clean this crap up.
 #
 RTEMS_BUILD_ROOT="${with_rtems_build_top}"
 AC_SUBST([RTEMS_BUILD_ROOT])

cpukit/dev/i2c/xilinx-axi-i2c.c

@@ -502,7 +502,7 @@ xilinx_axi_i2c_read_rx_fifo(xilinx_axi_i2c_bus* bus)
          * One more byte to be received. This is set up by programming the RX
          * FIFO programmable depth interrupt register with a value that is 2
          * less than the number we need (the register is minus 1). When we have
-         * one byte left disable the TX error interrupt because setting the NO
+         * one byte left, disable the TX error interrupt because setting the NO
          * ACK bit in the command register causes a TX error interrupt. Set the
          * TXAK bit in the CR to not-acknowledge the next byte received telling
          * the slave sender the master accepts no more data, then read the

testsuites/samples/fileio/init.c

@@ -721,7 +721,7 @@ static void fileio_list_file(void)
     printf("\n Trying to open file \"%s\" for read\n",fname);
     fd = open(fname,O_RDONLY);
     if (fd < 0) {
-      printf("*** file open failed, errno = %d(%s)\n",errno,strerror(errno));
+      printf("*** file failed to open, errno = %d(%s)\n",errno,strerror(errno));
     }
   }
 
@@ -1014,7 +1014,7 @@ static void fileio_read_file(void)
     printf("... opening file \"%s\"\n",fname);
     fd = open(fname,O_RDONLY);
     if (fd < 0) {
-      printf("*** file open failed, errno = %d(%s)\n",errno,strerror(errno));
+      printf("*** failed to open file, errno = %d(%s)\n",errno,strerror(errno));
       failed = true;
     }
   }