Add empty file to prevent the version from libm-ieee754 be compiled

since the later is not needed.

sysdeps/m68k/fpu/e_rem_pio2.c

@@ -0,0 +1,3 @@
+/* Empty.  This file is only meant to avoid compiling the file with the
+   same name in the libm-ieee754 directory.  The code is not used since
+   there is an assembler version for all users of this file.  */

sysdeps/m68k/fpu/e_rem_pio2f.c

@@ -0,0 +1,3 @@
+/* Empty.  This file is only meant to avoid compiling the file with the
+   same name in the libm-ieee754 directory.  The code is not used since
+   there is an assembler version for all users of this file.  */

sysdeps/m68k/fpu/e_rem_pio2l.c

@@ -0,0 +1,3 @@
+/* Empty.  This file is only meant to avoid compiling the file with the
+   same name in the libm-ieee754 directory.  The code is not used since
+   there is an assembler version for all users of this file.  */

sysdeps/m68k/fpu/k_rem_pio2.c

@@ -0,0 +1,3 @@
+/* Empty.  This file is only meant to avoid compiling the file with the
+   same name in the libm-ieee754 directory.  The code is not used since
+   there is an assembler version for all users of this file.  */

sysdeps/m68k/fpu/k_rem_pio2f.c

@@ -0,0 +1,3 @@
+/* Empty.  This file is only meant to avoid compiling the file with the
+   same name in the libm-ieee754 directory.  The code is not used since
+   there is an assembler version for all users of this file.  */

sysdeps/m68k/fpu/k_rem_pio2l.c

@@ -0,0 +1,3 @@
+/* Empty.  This file is only meant to avoid compiling the file with the
+   same name in the libm-ieee754 directory.  The code is not used since
+   there is an assembler version for all users of this file.  */